The 2009 Banka Koper Slovenia Open was a tennis tournament played on outdoor hard courts. It was the 5th edition of the Banka Koper Slovenia Open, and was part of the WTA International tournaments of the 2009 WTA Tour. It took place in Portorož, Slovenia, from July 20 through July 26, 2009.
| Player | Nationality | Ranking* | Seeding |
|---|---|---|---|
| Dinara Safina |  Russia | 1 | 1 |
| Anabel Medina Garrigues |  | 21 | 2 |
 Estonia | 24 | 3 | |
| Roberta Vinci |  Italy | 46 | 4 |
| Sara Errani | Italy | 47 | 5 |
| Lucie Šafářová |  Czech Republic | 49 | 6 |
| Russia | 50 | 7 | |
| Petra Kvitová | Czech Republic | 63 | 8 |
The following players received wildcards into the singles main draw
The following players received entry from the qualifying draw:
See main article: 2009 Banka Koper Slovenia Open – Singles. Dinara Safina def. Sara Errani, 65 - 7, 6 - 1, 7 - 5
See main article: 2009 Banka Koper Slovenia Open – Doubles. Julia Görges / Vladimíra Uhlířová def. 
Camille Pin / Klára Zakopalová, 6 - 4, 6 - 2
